| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'P.I. Not' | - | Dark-Green | - | - | Unknown | Pale-Lavender | - | Unknown | --NR-- |
| 'Pa Paw' | Large | Blue/Green | - | - | Unknown | - | - | Jones, Sam | --NR-- |
| 'Paleface' | Medium | Med-Green | Medial | White | Sport | - | - | Wade, Van | --NR-- |
| 'Panky' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Particle Accelerator' | Large | Med-Green | Streaked | White | Hybrid | - | - | Timm, Phil | --NR-- |
| 'Patricia the Stripper' | Large | Blue/Green | Medial | Green | Sport | Pale-Lavender | July into August | Budd Gardens | --NR-- |
| 'Pattycakes' | Medium | Blue/Green | - | - | Sport | Near-White | July | Lydell, Ransom | --NR-- |
| 'Pe King' | Medium | Light-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Pea Pod' (Solberg) | Large | Dark-Green | - | - | Sport | Near-White | June into July | Solberg, Robert | .2016 .2018 |
| 'Peacock Strut' | Large | Dark-Green | - | - | Hybrid | Light-Purple | July | Solberg, Robert | .2005 |
| 'PeeDee Picotee' | Medium | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Syre-Herz, Ursula | .1992 |
| 'Penny Ante' | Medium | Light-Green | - | - | Unknown | - | - | Wade, Shirley | --NR-- |
| 'Peoria Knickers' | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Pete's Passion' | Large | Yellow | Marginal | Dark Green | Sport | Pale-Lavender | July into August | Ruh, Peter | .1997 |
| 'Pete's Slon-he' | Miniature | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | de Rooij, Piet | .2015 |
| 'Pharaoh's Fawcett' | Large | Blue/Green | Marginal | Green | Sport | Near-White | June into July | Hansen, Hans | --NR-- |
| 'Pianissimo' | Medium | Light-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Johnson, Greg | .2004 |
| 'Picadello' | Large | Blue/Green | Marginal | Yellow | Sport | Pale-Lavender | July | Krul, Nancy & Belle Gardens | .1995 |
| 'Pickle Puss' | Medium | Blue/Green | | | Unknown | | | Chopko, Dave | --NR-- |
| 'Pie in the Sky' | Large | Med-Green | Streaked | Yellow | Hybrid | Med-Lavender | July into August | Elslager, Ed | .2003 |
| 'Pinky' | Large | Med-Green | - | - | Hybrid | Light-Purple | July | Banyai, Pauline | .1990 |
| 'Pistache' | Large | Med-Green | Streaked | White | Sport | - | - | Van Eechaute, Danny | .2007 |
| 'Pistachio Glow' | Small | Yellow | - | - | Hybrid | Near-White | July | Savory, Robert | .1990 |
| 'Pitter Patter' | Miniature | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Avent, Tony | .2007 |
| 'Pitty Pat' | Medium | Light-Green | - | - | Unknown | Light-Purple | July into August | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Pixie Dust' | Miniature | Med-Green | Streaked | Speckles | Unknown | - | July | Goodwin, Randy | .2009 |
| 'Pixie Vamp' | Small | Dark-Green | Marginal | White | Hybrid | Light-Purple | July | Ward, Dr Dick & Ward, Jane | .1996 |
| 'Pizzazz' | Large | Blue/Green | Marginal | Creamy White | Unknown | Near-White | July | Vaughn, Kevin & The American Hosta Society | .1986 |
| 'Plain Jane' | Medium | Yellow | - | - | Hybrid | Pure-White | June into July | Benedict, Dr Ralph (Herb) & Wade, Van | .2007 |
| 'Plain Jane in a Frilly Skirt' | Large | Med-Green | - | - | Hybrid | Near-White | June into July | Kwick, Charles | .2017 |
| 'Platinum Blonde' | Large | Yellow | - | - | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Pleasure Seeker' | Medium | Blue/Green | - | - | Hybrid | - | - | Unknown | --NR-- |
| 'Plug Nickel' | Small | Dark-Green | - | - | TC Sport | Light-Purple | July | Solberg, Robert | .2003 |
| 'Plum Nutty' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Solberg, Robert | .2011 |
| 'Plumb Bob' | Medium | Med-Green | - | - | Unknown | Light-Purple | August | O'Harra, Russ | --NR-- |
| 'Poison Dart Frog' | - | - | - | - | Hybrid | - | - | Moore, Jeff | --NR-- |
| 'Pole Cat' | Medium | Dark-Green | Medial | White | Sport | Pale-Lavender | July into August | Lydell, Ransom | --NR-- |
| 'Pole Dancer' | Small | Light-Green | Marginal | White | Unknown | - | - | Meyer, Bill & Brashear, Carol | --NR-- |
| 'Polish Splash' | Large | Dark-Green | Streaked | Yellow | Unknown | - | - | Sobkowska-Dopierala, Aneta | --NR-- |
| 'Pollock's Splatter' | - | - | Streaked | - | Unknown | - | - | Unknown | --NR-- |
| 'Pond Scum' | Medium | Dark-Green | | | Unknown | Med-Lavender | | Meyer, Bill & Falstad, Clarence | --NR-- |
| 'Pooh Bear' | Small | Yellow | Marginal | Green | Sport | Pale-Lavender | June into July | Falstad, C.H. | .1988 |
| 'Poor Man's Banana Boat' | Medium | Med-Green | Streaked | White | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Pop the Question' | Medium | Med-Green | - | - | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Popo' | Small | Med-Green | - | - | Unknown | Pale-Lavender | June into July | O'Harra, Russ & Riehl, Frank | .1993 |
| 'Powder Brute' | | | Streaked | | Hybrid | | | Koza, Carole | --NR-- |
| 'Powered by Bob' | Medium | Med-Green | Streaked | Yellow | Sport | - | - | Trucks, Gary | --NR-- |
| 'Prairie Sum Shine' | Giant | Yellow | - | - | Sport | Med-Lavender | July into August | Metz, Mary Ann | .2009 |
| 'Predator's Paraphinalia' | - | Med-Green | - | - | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Premature Burial' | - | - | - | - | Hybrid | - | - | Moore, Jeff | --NR-- |
| 'Pro Tek Tor' | Giant | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Nyikos, Frank | .2007 |
| 'Prom Queen' | Medium | Blue/Green | Medial | Yellow | Sport | Pale-Lavender | June into July | Meyer, Roxanne | .2006 |
| 'Puck' | Small | Med-Green | - | - | TC Sport | Pale-Lavender | June | Zilis, Mark | .2003 |
| 'Pucker Power' | Giant | Dark-Green | | | Hybrid | Light-Purple | July into August | Zumach, Hank & Herold, Glenn | .2021 |
| 'Pucker Up' (Brashear) | Small | Dark-Green | - | - | Unknown | - | - | Brashear, Carol | --NR-- |
| 'Pugie's Pride' | Small | Dark-Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Elslager, Ed | .2001 |
| 'Punky' | Medium | Yellow | Marginal | Greenish White | Sport | Pale-Lavender | July into August | Kuk, Bob | .1999 |
| 'Punky D' | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Purple Flame Forever' | Miniature | Yellow | - | - | Hybrid | - | - | Zilis, Mark | .1988 |
| 'Pussy Foot' | Small | Med-Green | Medial | White | Unknown | - | - | Lydell, Ransom | --NR-- |
|